stranded service drop wire question

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Old 07-27-15, 04:25 PM
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stranded service drop wire question

Just had new service drop installed. I noticed that the messenger wire that is used to clamp to the riser and that serves as the ground is stranded.

The portion between the clamp and the crimp has a 2 or 3" spot where the individual conductors have unravelled a bit.... its not twisted tight like the rest of the wire.

Its sort of right at a bend where the linesman made a drip loop.....

Is that a weak spot now or something to be concerned about?
 
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Old 07-27-15, 05:39 PM
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Are any of the strands broken? If not then the wire should be okay.

Now you might argue that some of the partially unraveled strands are bearing more of the weight of the service drop and will break one at a time. Well, wait until two strands have broken and then call the power company stating the the wire is indeed frayed (which it will then be) and needs repair.
 
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Old 07-27-15, 05:58 PM
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No, they are not broken. They are just ever so slightly spaced or sprawled apart due to the bend....

In fact, the weight of the drop is secured by the clamp... this is on the slack portion between that clamp and the crimp connection... so its not bearing the brunt of the weight or anything.

I was thinking along the lines on wire guage though... like if you took a #2 wire and separated each individual strand where they are not touching one another.... does that now make it a smaller guage? From both resistance and strength standpoints.... (if that makes any sense)....
 
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Old 07-27-15, 07:22 PM
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The end of the cable is still in a crimp and then goes to your service neutral.... correct ?
Untwisting the wire won't present any loss of current carrying capability.

FYI.....One of those strands is plated steel and is what gives the drop its strength.
 
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Old 07-28-15, 05:57 AM
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Yes PJ... this section is not anywhere near the crimp.

Doing some research I think its fair to call what I am describing "bird caging" of the conductor.... whether or not that the official term I don't know.
 
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Old 07-28-15, 09:19 AM
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It's not a big deal. The strands are meant to move around and twist a bit as the cable blows in the breeze, ices, etc.
 
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Old 07-28-15, 05:24 PM
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FYI.....One of those strands is plated steel and is what gives the drop its strength.
Typically it's called ACSR; Aluminum Conductor Steel Reinforced.

ACSR
 
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